How many of you here thinks that Cylinder head port work is essential in a performance engine ? ? Or how many of you here will bring your cylinder head to get the head ported by Port Flow ? ? ? ? Does porting of head can really increase air flow increase poweR ? ? ? ? ?

ThanksS :thumbup:

 

opps sorry for topic mistake :P it Cylinder Head Porting not Dead porting :P

 

I was told that JDM long block dosen't have VIN number ? ? ? issit true ? ? ? if the block doesn't have VIN number . . how are all the vehicle control department keep track of what engine in what chassis ? ? ?

If its so then everybody can happily swaping in same engine not going against the law as they can't keep track ? ? an i right ? ? ?

Sorry for the ignorance question

 

 

I already posted this in the integra forum, but i'll go ahead and repost it. You wont' gain much at all from porting your head. I did it myself this summer for free with a dremel and when i took off the head i found that it was already almost perfect.

The point of porting the head is to match the ports in the head to the IM and header gaskets. They were almost exact from the factory, but i matched them up as much as i could and also ported inside, and worked on the valves a bit. The gains i noticed were MINIMAL, it's fine if you do it for free like i did (only recommended if you have experience) but if you're going to pay for it i wouldn't really recommend it, you won't gain very much. Only do it if you're going hardcore and running out of cheaper mods to do

Oh and about the JDM engines, they're very illegal. First of all, they won't pass smog, and second of all, they are illegal because the vehicle control dept can't keep track of them. Your engine is only legal if the VIN matches up to your chassis.

Hope that helped

 

ok...head porting is a great means of getting MORE hp out of intakes, headers, and exhaust...not to flame on ya..but if you have no experience on doing head porting...your not gonna know what your doing and not going to get the true potential of your engine...just because the ports are almost the same size on your head as your intake and exhaust manifolds doenst mean they are "almost exact" doesnt mean there isnt room for improvement..yes..they are going to be almost exact, car manufactures make them that way...its called effecincy...if you look at after market headers like, SPOON, COMPTECH, MUGEN, APEXi etc...there ports are going to be bigger than your STOCK ports...the point of Porting your intake and exhaust is to get more air in, you dont want to polish your intake ports on your head due to if its to smooth the air and fuel wont mix properly, your exhaust you want to be as big as your exhaust header ports are no bigger, no smaller, and it really doesnt matter if its polished because its just gonna get dirty...there is 10-30hp avail in porting out a head on a HONDA, if its done correctly buy a trianed professional, go tell an engine builder that there is not much to gain from porting out your head...and he will mostlikely laugh at you...:madfawk:

 

alright, no need to get angry there. Please don't make harsh judgements about whether or not i know what i'm doing if this is one of the only posts you've read from me. True, there are gains to be had, i never denied that. All i'm saying is that there will not be any HUGE gains from a honda head. The ports are very close to perfect, and i did go inside the head and port everything.

I suggest you talk to an engine builder who regularly works on honda engines, he will tell you exactly what i have just told you. On american cars, not to stereotype but it's true, there are much bigger gains to be had. I've heard of mustangs gaining 40 hp from porting the head. This is because their original design is much less efficient. I suggest you do some more homework before you jump to any conclusions. I'm not trying to sound angry or sarcastic, I am simply trying to clarify my point.

 

im not gonna argue that Hondas have great head flow from the factory, but there are large gains you can get, if you can get 15hp out of porting out a head..not just the I/E ports, but backcutting valves, lighter valves, etc...im sorry, but i concider that a pretty big gain...15hp on a 1.6L engine, thats the same hp gain as 40hp in a 4.6L MUSTANG engine...im not saying you dont know what your doing, thats not intention, because you can lose hp if your head is done wrong..my point, my point is, that head porting which is what this thread is about, is a great investment, your gonna get more out of the other parts you put on or in your engine, especially if your going FI.

PORTFLOW is a very good company, and do good work from what i have heard and read. they are expensive though but you get what you pay for i guess.

 

ThankzZ for all the usefull comments guys I was told that B18C5 and B16B head are ported B16A head . . .

If thats the case, Will it be cheaper to get a B16B or B18C5 head compare to getting a B16A head and have it ported by portflow ? ? and which one would produce better airflow/performance and which one will be more durable ? ? ?

ThankzZ :thumbup:

 

More opinion and comments please qtiger ? ? Inspyral ? ? MrFatBooty ? ? 1stGenCRXer ? ? dubster99 ? ? all the expertSsS out there ? ? ? ?